KERN & Sohn GmbH Ziegelei 1 D-72336 Balingen E-Mail: info@kern-sohn.com Phone: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com Operating manual Pallet truck scale KERN VHE-A Version 1.
GB KERN VHE-A Version 1.1 01/2014 Operating instructions Pallet truck scale Contents 1 1.1 2 Technical data ................................................................................................... 3 Dimensions ................................................................................................................ 4 Appliance overview ........................................................................................... 5 2.1 2.2 Overview of display ............................
1 Technical data KERN Readability (d) Weighing range (max) Reproducibility Linearity Stabilization time VHE 2T5A 5 kg 2000 kg 20 kg ± 30 kg 3 sec. Allowable ambient temperature -10° C .... + 40° C Humidity of air max. 95 % (not condensing) Weighing unit kg Electric Supply 2 x 1.
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2 Appliance overview 2.
2.2 Keyboard overview 2.2.1 In weighing mode: Operation Short key pressing • Zeroing long pressing of button (>3 sec) very long pressing of button (>10 sec) Press both buttons at the same time until OFF is displayed.
3 Basic instructions for scales 3.1 Proper use The balance you purchased is intended to determine the weighing value of material to be weighed. It is intended to be used as a “non-automatic balance”, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing pan. As soon as a stable weighing value is reached the weighing value can be read. 3.2 Improper Use Do not use balance for dynamic weighing.
3.4 Monitoring of Test Resources In the framework of quality assurance the measuring-related properties of the balance and, if applicable, the testing weight, must be checked regularly. The responsible user must define a suitable interval as well as type and scope of this test. Information is available on KERN’s home page (www.kern-sohn.com) with regard to the monitoring of balance test substances and the test weights required for this.
6 Unpacking and placing 6.1 Site of installation, place of operation for scales The balances are designed in a way that reliable weighing results are achieved in common conditions of use. You will work accurately and fast, if you select the right location for your balance. On the installation site observe the following: The load must be lifted clear of the display unit’s case and other pallets.
Optimum accuracy in weighing results is achieved if the load centre is between the forks. The forks are easily bent and twisted when the load is offcentre. This may result in diminished accuracy. Avoid jarring during weighing Protect the balance against high humidity, vapours and dust Do not expose the device to extreme dampness for longer periods of time.
7 Adjustment As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory). This adjustment process must be carried out for the first commissioning, after each change of location as well as in case of fluctuating environment temperature.
How to carry out adjustments Switch off weighing system Press for 30 sec., PAR is displayed Press until CAL is displayed Press , ZERO is displayed flashing, because the reference height is not reached yet Place a pallet and adjust the reference height, when the reference height is reached, the display stops flashing and only the right-hand bar above in the display continues to be displayed. Press for approx. 3 sec., the count down fur setting the first adjustment point runs automatically.
Press for approx. 3 sec., the count down for setting the second adjustment point runs off automatically. The weight for the second adjustment point is displayed. Moreover two points appear in the display. Place 2000 kg After placing the weight the weighing system leaves the reference height, the display flashes Place the weighing system on reference height, the display stops flashing. Press for approx. 3 sec.
Carry out adjustment by entering the adjustment weight Switch off weighing system Press Press for 30 sec., PAR is displayed until CAL is displayed Press , ZERO is displayed flashing, because the reference height is not reached yet Place a pallet and adjust the reference height, when the reference height is reached, the display stops flashing and only the righthand bar above in the display continues to be displayed. Press for approx. 3 sec., the count down runs off automatically. .
Acknowledge by . Place the set weight and set the reference height Press for approx. 3 sec., the count down runs off automatically, followed by the program version and Save. Then the balance returns automatically into the weighing mode. Adjustment now has finished. An adjusting error or incorrect adjusting weight will be indicated by the error message; repeat adjustment procedure.
8 Commissioning Correct weighing only possible at „reference height“ (see fig. 1 and 2) Actuate repeatedly the drawbar handle (hand lever 1 downwards. fig.1) until the reference height is reached. In the display appears see fig.2. Fig. 1 Fig. 2 If the pallet truck scale is not in reference height, the weight value in the display appears flashing. Place the pallet truck scale into reference height, the display does not more flash.
8.1 Switch on the pallet truck scale Switch on the pallet truck scale using key, the balance carries out a selftest and changes then to the zero display 8.2 Switch off the pallet truck scale (example) Press the buttons time until OFF appears. and at the same After that the display extinguishes. The display extinguishes automatically when the buttons have not been pressed for two minutes or if the system is not used.
8.3 Weighing key, Switch on the pallet truck scale using the balance carries out a selftest and changes then to the zero display „0“ is displayed flashing. If „0“ is not displayed, press Let the pallet truck scale lower onto the lowest point. Three arrows are lighting up when the lowest point is reached. Take up the load and lift till to reference height. Three arrows are lighting up. The weight value is displayed flashing. Continue lifting the load. Two arrows are lighting up.
8.4 Zero point correction Switch on pallet truck scale using button. Check whether the forks of the pallet truck scale are empty Lift pallet truck scale till to the reference height (see chap. 8, fig. 1). If the display does not show zero, reset display using 8.5 Taring Lift weighing container till to the reference height (see chap. 8, fig. 1). Switch on pallet truck scale using button. The weight of the weighing container is displayed. Tare using button.
8.6 Totalization The display unit offers an option that allows the addition of weighing values and the display of the total weight. Pick up the load and bring it to reference height (example) Press . The value is stored and „M“ is displayed. The display alternately shows the consecutive number (number of weighings) and the total weight. After a few seconds the system automatically reverts to standard weighing mode. Number of weighing procedures Total weight Add-up another load as described before.
8.9 Battery operation Power is supplied via 2 x 1.5V AA batteries. At a regular use with full batteries, approx. 1 year can be weighed. If the battery symbol is displayed, this means that the batteries will soon be flat. Change the batteries immediately. If the capacity of the batteries is completely exhausted, the display will switch-off automatically. In order to save the battery, the balance switches automatically off after 3 minutes without load changing.
9 Error messages - O.L. - The weighing system is overloaded. Remove the load Err06 Load cell signal too high Err07 Load cell signal too low Err12 Calibration deleted Err98 The calibration value must be higher than the former value Battery symbol flashes: The battery is almost empty and has to be replaced (see chap. 8.9) M 22 Flashing „M“: Memory is full, no more weights can be added-up. Delete memory (see chap. 8.
10 Servicing, maintenance, disposal 10.1 Clean Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Take care that the device is not penetrated by fluids and polish it with a dry soft cloth. 10.2 Servicing, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. The same maintenance guidelines as for standard manual lift truck without loaddisplay system.
11 Instant help In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning. Help: Fault Possible cause The displayed weight does not glow. • The balance is not switched on. • The batteries are empty The displayed weight is permanently • changing Draught/air movement • Sites with vibration. • Loading fork is in contact with foreign matter.
